Improvement in boring-machines



JACOB GARDNER.

Improvement in Boring Machines.

Paten-ted Apri|16,1872. Fig/.1.

an incline, g2, on the inside.

U1\TI'IEDa 'S'rarn Y. IMPROVEMENT IN BOR|NGMACHiNES.

Specification forming part of Letters Patent No. 125,802, dated April 16, 1872.

Specification describing Improvements in Boring-Machines, invented by JACOB GARD- NER, of Bigler, in the county of Adams and State of Pennsylvania.

The invention relates to that class of post or rake-head borers in which the article to be bored is moved up to the auger on a carriage, while said post is itself clamped to a transversely-movable holder. A

Figure lis a vertical and sectional elevation of a post-borer; Fig. 2, a plan view; and Figs. 3 ,and 4 are detail views, showing my improvements.

A represents the frame; B, the carriage 5' E, the boring-tool; and O, the post-holder, with standards c and ratchet-flange c1. b is a pawl attached to lever t2. D is a lever, pivoted to the frame and carriage by means of connecting-straps, and used to advance and retract the said carriage. The holder G is provided -with a iian'e c5 or c6 on eachside ofthe bottoni, which has a pair of notches at intervals. rIhe pairs of notches on each iiange do not correspond to each other, but to diiierent styles of posts, c5 being for a tive-rail post, in which the rails are placed at unequal distances apart, while c is for a six-rail fence Whose rails are placed at equal intervals. Thev latter is generally a stronger, better proportioned, and better post, and is employed for outline, while the former, which is for cross-line fences, may be less sightly and strong. F is a cross-ba-r having a lock-stud, f, on one end, and projection f1 placed at an angle thereto on the other. fl is inclined at f2 on the front side of the bar. It is recessed to receive the V-shaped bar G, which has a lock-stud, g, on one side, and a projection, g1, on the other. Bar G has also These bars are tted movably in slots of the carriage B, so that the lever c2, when drawn back, Will act against the incline of each bar F G, throwing one outward toward one side and the other outward on the other side. H is a loose-piv oted and laterally-movable bar, having the tongue h, Which iits on each'side of a projection, k, of the short bar K. It passes through the carriage sides and bears against the locksprings l Z.

Vhen the operator is ready to bore his post he clamps the same upon holder (l, and if it be ,such an one as Will suit for six rails he slides the bar H toward the side lock intended for a five-rail post until the tongue hl slips over the projection k. The tive-rail lock is then held out of action during the time that this post is being bored. The lever c2 being now thrown back, acts against the incline g2 of bar G, which unlocks stud g and allows the holder C to move on until the spring-lock stud meets another notch into which it may loclr. On the other hand, if a five-rail post is to be bored the rod H is made to slide laterally until its tongue catches on the other side of the projection 7c. By this construction the same holder O will answer for both kinds of posts, and yet be operated by the same mechanism.

I am aware of the patent granted to B. F. Mohr, March 3, 1868, for borer, and beg leave to disclaim all the devices therein shown and described; but

What I claim to be new, and desire to protect by Letters Patent, is-

The ratcheted post-holder C with notched flanges c5 c6, and carriage B with lock-springs l Z and pawl-lever c2, in combination with the cross-bars H h, K k, F f f1 f2, and G g g1 g2, all connected and arranged substantially as and for the purpose described.

JACOB GARDNER.

Vitnesses:

BENJAMIN W. Coon, JESSE HoUcK. 

